/*
 * Copyright 2017 Netflix, Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License")
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.netflix.spinnaker.clouddriver.requestqueue.pooled;

import java.util.concurrent.atomic.AtomicBoolean;

class PollCoordinator {
  private final Object notifier = new Object();
  private final AtomicBoolean itemsAdded = new AtomicBoolean();

  void reset() {
    itemsAdded.set(false);
  }

  void notifyItemsAdded() {
    synchronized (notifier) {
      itemsAdded.set(true);
      notifier.notifyAll();
    }
  }

  void waitForItems(boolean skipWait) {
    if (skipWait) {
      return;
    }

    if (itemsAdded.get()) {
      return;
    }

    synchronized (notifier) {
      if (!itemsAdded.get()) {
        try {
          notifier.wait(50);
        } catch (InterruptedException ignored) {

        }
      }
    }
  }
}
